sjcowboywife sjcowboywife

16-05-2017
Mathematics

contestada

how many 7-digit phone numbers can be formed if the first digit cannot be zero and no digit can be repeated

Respuesta :

Аноним Аноним

16-05-2017

8 * 9 * 8 * 7 * 6 * 5 * 4

Answer Link

16-05-2017

If the first digit can not be 0 or 1, then there are 8 choices for the first digit. The other 6 have no restrictions, so there are 10 choices for each of those. 8⋅1000000

Answer Link

Otras preguntas

Which of the following best explains why secondary sources are important to historians? A. They put historical events in the correct chronological order. B. The

in what way are the homestead act and the dawes act similar

When boiling water begins to turn to steam, which of the following remains the same in both the liquid and the vapor? A. phase B. density C. volume D. temperatu

Why did friars and Jesuits go to the Spanish colines in the Americas? a.gold and glory b.convert people to Catholicism c. serve native people who had become ch

7e - 4 = 31 how can I solve this?

Slope 2; passing through (4,12)

What is the cost of 8 twelve packs of soda if the cost of 3 twelve packs are $8

What did the Reformation lead to? a. the division of Christianity into Catholic and Protestant faiths b. standardized religious writings c. religious reformers

Which of the following is one of the five causes of a business cycle? a. decrease in consumer demand c. recession b. external shocks d. none of the above

Determine the perimeter of each rectangle 149 m 76 m